Gomectina rod and pitman



UNITED STATES PATENT Orricne JOHN B. LANG, OF ITHAGA, NEW YORK.

CONNECTING-ROD AND PITMAN.

SPECIFICATION forming part of Letters Patent No. 290,332, dated December 18, 1883.

Application filed October 4,1883. (No model.)

engines; and it consists in the insertion of a set-screw in cavities in the substance of the rod, longitudinally to its length, that tightens the boxes. Its mode of construction will be apparent as I describe my invention.

Figure 1 is a side ot'a rod with my devicein it. Fig. 2 is a sectional view of the same. Fig. 3 is a section of the rod close to the crossbar 0. Figs. 4, 5, and 6 are detached parts, identified by the letters of reference on them.

In the figures, a is a part'of a connectingrod, and b b the two parts of the boxing for the cross-head journal; and c is a bar, madesolid with or as a part of theconnecting-rod, with a square hole, 0, in it, in which is placed the head h of the set-screw 7;, which head is square and bears directly on the boxing. The

threaded part of the set-screw extends toward 1 a, the shaft of the rod, and iaenon it a round movable burr, 0, against which the round jam-nut e bears, to hold the main burr e fast. In the end of the burre is a projection, f, from the connecting-rod. which is round, and acts as a journal on which one end of the burr turns, and as a steady-pin, to prevent vibrations or displacements by the quick motions otthe connecting-rod. Thus it will be seen that the connectingrod has the usual boX- ing, b I), put as usual in the-end of the rod, but that I make as part of the rod the bar 0, with a square hole in it. in which is placed the head of the set-screw bolt, while the burrs e c are turned; that the said burrs are in a special cavity or mortise made in the end of the connecting-rod, and the displacement of the end of the burr the farthest from the shaftjournal is avoided by the use of the boss or projection j, which enters a bearing-space made in this end of the burr c. This makes an advantageous and efficient means for tightening the boxes b b about the shaft in the journalopening (1.

Several changes in construction may be made-as, for example,the set-screw bar 0 may be made removable and adjustable; but I prefor it to be ibrged as a solid part of the rod. The burrs e (2 may be octagonal or other shape, with an especial tool to turn them. and so on of other like changes. I have shown round holes e in the burrs, by which they are turned. I bed in the box b a steel plate, next to the head of the screwholt, as indicated in Fig. 2.

The other advantages and parts of my inve'n-' tion are apparent.

What 1 claim as my invention isl. A connecting-rod provided with a setscrew whose head is held in a cross-bar next to the shaft-boxing, and the burr of which,on the thread of the set-scre\v, bears on the metallic substance of the red, the set-screw and burr being adj ustcd in the interior of the rod in the line of its length, as shown and described.

2. The combination of the projection f of the connecting-rod with the burr e and setscrew h, all within the interior of the rod, substantial] y as described.

3. The transverse crossbar provided with a four, six, or other sided cavity fitted to receive the head of the set-screw, in combination with the shaft-boxing, set-screw, screw-burrs, and projection on which the burr ot' the setscrew turns, substantially as shown and described.

JOHN B. LANG. 

